Presentation of DeNox Technolo gy Denitrification Type S.C ...

1 June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 Via Pietro Nenni, 15 - 27058 VOGHERA ITALYTel. +39 0383 3371 Fax +39 0383 369052E-mail: of DeNox TechnologygyDenitrification Type Catalytic ReductionJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 IDRECO DeNox - Denitrification Type SANTO 3P. STATION :ENEL PORTO TORRESITALYPOWER: 1 x 320 FUEL :COALCAPACITY :940 000 Nm3/hCAPACITY : Nm3/hFIUME SANTO 4P. STATION :ENEL PORTO TORRESITALYPOWER: 1 x 320 FUEL :COALCAPACITY : Nm3/hLA SPEZIA 3P. STATION :ENEL LA SPEZIAITALYITALYPOWER: 1 x 600 FUEL :COALCAPACITY : Nm3 ENEL FIUME SANTO - ITALYREACTOR ASSEMBLY June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 MAIN PART OF DENITRIFICATIONTheDeNOxplantincomposedby thefollowing3mainsystems:TheDeNOxplantin composedbythefollowing3mainsystems: Unloading and Storage of Ammonia Ammonia Evaporation Reactor SCRA mmonia as Anhydrous, Aqueous or from UreaJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 GENERAL LAYOUT OF HIGH DUST Denitrification Reactor with NH3 Evaporation area 25 x 50 m.

2 NH3 Unloading & Storage 37 x 37 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONThe Selective Catalytic Redution of Nitrogen Oxides NOx \ (NO,NO2) by means of ammonia injected on catalyst to obtain free N2 Nitrogen, follows the below chemical reactions:June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONP lateHoneycombJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONJune 2015 THE SCIENCE OF A PURE

3 ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONLA SPEZIA DESIGN DATA AND FUNCIONAL REQUIREMENTSLa Spezia power plant Section 3 is a multifuel unit operating in coal, oil and/or gas gas is used only during start-up of the unit. Exceptionally the boiler may be fedded with fuel oil for thehliwhole plant is provided with 1x100% SCR design data for ducts and reactors are as follows:TEMPERATURE:400 CINTERNALPRESSURE:+/-650mm/H2 OINTERNALPRESSURE:/650mm/H2 OMAX. TRANSIENT PRESSURE: +/- 1100 mm/H2 OThe plant normally operates with coal combustion in a range of 77% - 100%.

4 Minimumloadis30%Minimumloadis30%.Maximum Gas Flow shall be 110% of design will be provided in aqueous solution (25% - 30%) and completely vaporized in contact water ammonia will be diluted with hot air (temperature after mixing >130 C) before entering theammonia injection 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONLA SPEZIA DESIGN DATA AND FUNCIONAL REQUIREMENTS (cont.)30% of bolier load is Nm3 flue gas flowrate crossing the ammonia injection system, comes partly from the economizer and partlyfhhbfrom thethe ratio between the two streams varies depending onthe load, in order to achieve the minimum requiredtemperature at the 100% boiler load and 350 C temperature, the flue gas comes totally from the economizer and the eco by-pass is totally 30% boiler load, the flowrate from eco by-pass is approximately Nm3/h at 330 C, while theflowrate from economizer is Nm3/h at 280 ,upstreamtheammoniainjectsystem.

5 Theductsforfluegasrecycle are 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 PROCESS OF HIGH DUST DENITRIFICATIONLA SPEZIA DESIGN DATA AND FUNCIONAL REQUIREMENTS (end)The recycle flow rates, in Nm3/h, are as follows:100% MCRR ldfl(10%15%fflDNO)180000270000 Recycledgasflow(10%to15%ofgasflow toDeNOx reactor) flow to DeNox MCRR ecycled gas flow (20% to 25% of gas flow to DeNox reactor) flow to DeNox gas flow (28% to 32% of gas flow to DeNox reactor) flow to DeNox independently from the flow conditions upstream the ammonia injection system and particularlyindependently from the recycled flow rate and from the variation of the ratio between the flowrate fromeconomizer and the flow rate from eco and guide vanes have been designed in order to prevent excessive deposit of pressure drop for the NH3 injection plus mixer is less than 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 AMMONIA ANHYDROUSAQUEOUS AQUEOUS AMMONIA FROM UREA AMMONIA FROM UREAJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 ANHYDROUS OR AQUEOUS AMMONIA HAZARD

6 RATINGNFPA*standard rating system codes gyNOX reducing reagentsAMMONIAA nhydrous or aqueous solutionHEALTH HAZARD4 - Deadly3 -Extreme DangerFIRE HAZARDF lash Points F / C3 Extreme Danger2 - Hazardous1 - Slightly hazardous0 - Normal material/4 - Below 73 / 233 - Below 100 / 382 - Below 200 / 931 - Above 200 / 930 - Will not burn314 SPECIFIC HAZARDO xidizerOXYAcidACIDA lkaliALKC orrosiveCORU NO WATERREACTIVITY4 - May detonate3 - Shock/heat may detonate2 Vi l t hi l h34 Use NO WATERR adiation Hazard2 -Violent chemical change1 - Unstable if EPA minimum blilliClassified by EPA as Regulated Toxic substancereportable Spill Quantity:Anhydrous = 45 KgAqueous = 544 Kg*NATIONAL FIRE PROTECTION ASSOCIATIONThe NFPA system is used to give response teams immediate information as to what dangers are present during an emergencyToxic risk management plan for storage above.

7 Anhydrous = KgAqueous = Kg June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 UREA HAZARD RATINGNFPA*standard rating system codes NOX reducing reagentsNOX reducing reagentsStabilized 50% urea-based reagentHEALTH HAZARD4 - Deadly3 Et DFIRE HAZARD03 -Extreme Danger2 - Hazardous1 - Slightly hazardous0 - Normal materialFIRE HAZARDF lash Points F / C4 - Below 73 / 233 - Below 100 / 382 - Below 200 / 931 - Above 200 / 9300/0 - Will not burnSPECIFIC HAZARDO xidizerOXYAcidACID*AlkaliALKC orrosiveCORUse NO WATERR adiation EPA minimum reportable Spill Quantity: N/A*NATIONAL FIRE PROTECTION ASSOCIATIONThe NFPA system is used to give response teams immediate information as to what dangers are present during an emergencyNon classified by EPA as Regulated Toxic 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001P&ID OF ANHYDROUS AMMONIA UNLOADING AND STORAGEJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001P&ID OF AQUEOUS AMMONIA UNLOADING AND STORAGEJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 LAYOUT OF AQUEOUS AMMONIA UNLOADING AND STORAGE AREAJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 AMMONIA FROM UREAJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified

8 ISO9001P&ID OF AMMONIA EVAPORATION June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001LA SPEZIA DeNOxDATA OF AMMONIA EVAPORATION SYSTEM ExchangerMax. Flow rate of NH3 solution to be evaporated Kg / consumption @ 4 bar 180 CKg/ @gMixing Air with two stagesSteam consumption @ 4 bar 180 CKg / h669 Condensate Max Temp C80 Condensate Max. Te m p. C80 Air mixing + 1 stand-byFlow rate mixing airNm3 / air Temp. C>130 Total Steam consumptionKg / 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 LAYOUT OF AMMONIA EVAPORATION SYSTEM June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 IDRECO DeNox CFD CalculationJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 IDRECO DeNox PHYSICAL MODEL STUDY Model test for flue gas- Save design and scale up even at demanding process conditionsPerformance values for complex duct geometry-Performance values for complex duct geometry- Homogeneity- Temperature deviation-Velocity ENEL FIUME SANTO - ITALY-Velocity distribution- pressure drop- Elimination of dust ENEL LA SPEZIA - ITALYJune

9 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 AIG AMMONIA INJECTION GRID WITH STATIC MIXERAIG dosing system installed in a ductJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 AIG AMMONIA INJECTION GRID WITH STATIC MIXERSTATIC MIXER installed in a ductJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001LA SPEZIA DeNox REACTOR AREA BIRD VIEWJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001P&ID OF REACTOR SYSTEMJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001LA SPEZIA DeNox - REACTOR DESIGN DATAUnitValueGAS FLOW RATENm3 INLET mg/Nm3900 NOx OUTLETmg/Nm<190 NOx OUTLET mg/Nm3< 190 LEVELS OF +1 futureLEVELS OF 1 futureConsumption of NH3solution at 25% at 25%gJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 REACTOR OUTLINEJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 MATERIALS HIGH DUST DENITRIFICATIONTHE MAIN MATERIALS ARE AS FOLLOWS:REACTOR AND GAS DUCTSS teelPlatesDustchutesFlowrectifierandbaff les/flowdeflectorsEN10155S355 JOWPS teelPlates,Dustchutes,Flowrectifierandba ffles/flowdeflectorsEN10155S355 JOWPMin Thickness of plates: 5 mm.

10 For reactor and chutes and 6 mm. for the ductsExternal reinforcements, Beam for catalyst support (structural support parts)EU 28-85 16Mo3 Outlet gas measurement fixed gridASTM TP304 LConnection of instrumentsASTM TP316 LREACTOR AND GAS DUCTS SUPPORTING STEELWORKM ainsupportingsteelstructuresSO275 JOEN10025/95(Fe430C)Mainsupportingsteels tructuresSO275 JOEN10025/95(Fe430C)SO355 JO EN10025/95 (Fe 510 C)PUMPSC asingandImpellerAISI304 LCasingandImpellerAISI304 LJune 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9001 ERECTION SEQUENCE OF REACTOR & GAS DUCTS123456 June 2015 THE SCIENCE OF A PURE ENVIRONMENTC ertified ISO9